"'I have these size 12 boots for you, they are all-weather. Let's put them on and take care of you'," Foster quoted DePrimo as saying.

"The officer squatted down on the ground and proceeded to put socks and the new boots on this man. The officer expected NOTHING in return and did not know I was watching."

Foster said she's worked in law enforcement for 17 years and has never been more impressed.

"His presentation of human kindness has not been lost on myself or any of the Arizona law enforcement officials with whom this story has been shared," Foster wrote on Facebook. She said she never got the officer's name.

DePrimo told the Newsday newspaper that the homeless man "smiled from ear to ear" after getting the boots.

"It was like you gave him a million dollars," he added.

He told The New York Times that he keeps the receipt for the boots in his vest to remind him "that sometimes people have it worse".

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